105217147 has 4 divisors (see below), whose sum is σ = 120248176. Its totient is φ = 90186120.

The previous prime is 105217139. The next prime is 105217153. The reversal of 105217147 is 741712501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 741712501 = 9739 ⋅76159.

It is a cyclic number.

It is not a de Polignac number, because 105217147 - 2³ = 105217139 is a prime.

It is a super-2 number, since 2×105217147² = 22141296045639218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105217127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7515504 + ... + 7515517.

It is an arithmetic number, because the mean of its divisors is an integer number (30062044).

Almost surely, 2^105217147 is an apocalyptic number.

105217147 is a deficient number, since it is larger than the sum of its proper divisors (15031029).

105217147 is an equidigital number, since it uses as much as digits as its factorization.

105217147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15031028.

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 105217147 is about 10257.5409821263. The cubic root of 105217147 is about 472.0943909543.

Adding to 105217147 its reverse (741712501), we get a palindrome (846929648).

The spelling of 105217147 in words is "one hundred five million, two hundred seventeen thousand, one hundred forty-seven".